package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.time.LocalDateTime;

/**
 * 自定义切面，用来处理公共字段自动填充
 */
@Aspect
@Component
@Slf4j
public class AutoFillAspect {
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointCut(){}

    @Before("autoFillPointCut()")
    public void autoFill(JoinPoint jpt){
        log.info("开始公共字段填充");
        //获取方法签名
        MethodSignature signature = (MethodSignature) jpt.getSignature();
        //获取属性
        Object[] args = jpt.getArgs();
        if(args==null || args.length==0){
            return;
        }
        Object arg = args[0];
        //获取方法
        Method method = signature.getMethod();
        //获取注解
        AutoFill annotation = method.getAnnotation(AutoFill.class);
        OperationType value = annotation.value();
        try {
            //比较注解内容判断是更新还是新建
            if(value.equals(OperationType.INSERT)){
                //新建操作
                log.info("新建功能自动填充");
                Method setCreateTime = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
                Method setUpdateTime = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setCreateUser = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
                Method setUpdateUser = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                setCreateUser.invoke(arg, BaseContext.getCurrentId());
                setCreateTime.invoke(arg,LocalDateTime.now());
                setUpdateTime.invoke(arg,LocalDateTime.now());
                setUpdateUser.invoke(arg,BaseContext.getCurrentId());
            }else {
                //更新操作
                log.info("更新功能自动填充");
                Method setUpdateTime = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                setUpdateTime.invoke(arg,LocalDateTime.now());
                setUpdateUser.invoke(arg,BaseContext.getCurrentId());
            }
        } catch (Exception e) {
             e.printStackTrace();
        }
    }
}
